View Compilation Error

0_0_37767098_16734.cpp:65:11: error: 'll' was not declared in this scope
 int limit(ll x){
           ^
0_0_37767098_16734.cpp:65:16: error: expected ',' or ';' before '{' token
 int limit(ll x){
                ^
0_0_37767098_16734.cpp: In function 'bool check(const Mat&, const Mat&)':
0_0_37767098_16734.cpp:72:26: error: 'll' was not declared in this scope
         ans = limit(ans+(ll)lhs.a[1][i]*rhs.a[i][m]);
                          ^
0_0_37767098_16734.cpp:72:52: error: 'limit' cannot be used as a function
         ans = limit(ans+(ll)lhs.a[1][i]*rhs.a[i][m]);
                                                    ^